Simulation on mechanical performance of integrated T⁃shaped reinforced wall panel based on carbon fiber reinforced dynamic polymer composites

doi:10.19491/j.issn.1001-9278.2025.03.010

Abstract

Abstract:

The　prepreg tape with dynamic reversibility and excellent mechanical properties were prepared by using bisphenol⁃A diglycidyl ether as a resin matrix， glutaric anhydride as a curing agent， carbon fiber as a reinforcement. The tensile， compressive， bending， stress relaxation， and creep properties of the composites after hot pressing were investigated. According to The mechanical test results， the solid modeling was conducted for the secondary bonding forming and integrated forming structure panel， and a finite element simulation analysis was carried out. The results indicated that compared to the traditional secondary bonding forming structure panel， the maximum deformation of the integrated forming structure panel decreased by 28.57 %， 28.57 %， 28.04 % and 8.27 % under tension， compression， bending， and impact conditions， respectively， at the same external load. When buckling instability occurred， the critical load of the integrated structure panel increased by 84.69 %， and its longitudinal strain at the maximum deformation at each angle was greatly improved， demonstrating excellent anti⁃buckling performance.

Key words: carbon fiber reinforced composites, dynamic polymer, aircraft panel, mechanical property, finite element simulation

CLC Number:

TQ320.66

ZHANG Xun, LIU Xiang, FANG Mei, GUO Pan, FENG Yuezhan, HUANG Ming, LIU Chuntai. Simulation on mechanical performance of integrated T⁃shaped reinforced wall panel based on carbon fiber reinforced dynamic polymer composites[J]. China Plastics, 2025, 39(3): 53-59.

Figures/Tables 12

程序	保温/℃	升温速率/ ℃·min^-1	保持压力/MPa	保持时间/min
1	80	1.5	0.6	120
2	130	1.5	0.6	120
3	160	1.5	0.6	240
冷却行程	60	1.5	0.6	-

Tab.1. Process parameters for autoclave molding process

Fig.1. Analysis of creep， relaxation characteristics and mechanical properties of materials

Tab.2. Two structural schemes and ply information of composite T⁃stiffened panel

Fig.2. The stress cloud diagram results of composite T⁃stiffened panel under three working conditions

Fig.3. The load⁃displacement curves of composite T⁃stiffened panels under three working conditions

Fig.4. The schematic diagram of impact condition of composite T⁃stiffened panel

Fig.5. Impact deformation cloud diagram of composite T⁃stiffened panel at different times

Fig.6. The curve of displacement and collision contact force of composite T⁃stiffened panel with time

Fig.7. Boundary conditions for buckling analysis of composite T⁃stiffened panel

二次胶接结构壁板			一体化结构壁板
阶次	特征值	临界荷载/N	阶次	特征值	临界荷载/N
1	621.18	621 180	1	1 127.0	1 127 000
2	626.50	626 500	2	1 156.2	1 156 200
3	631.02	631 020	3	1 163.7	1 163 700
4	635.31	635 310	4	1 200.1	1 200 100
5	641.93	641 930	5	1 262.3	1 262 300

Tab.3. Buckling eigenvalue and critical load of composite T⁃stiffened panel

Fig.8. Comparison of nonlinear buckling modes of composite T⁃stiffened panel

Fig.9. Strain⁃load curves at typical wave peaks of composite T⁃stiffened panels at different angles

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